It's all the same meaning for Amitabha but depending on which part of Sinosphere and group one is in plus dialect differences in pronouncing the same name in Standard Chinese. At one time I recall there was that meaningless squabble in certain factions about which one is the best: Ahmituofo (some even squabble over should there be 'Ah' sound or just the short 'A' or the 'Ar') or Ohmituofo or Ermituofo. Then, there's the other one on 佛... is it fo or fu or fe ('fir' / 'fur') ... Don't get me started about the other rabbit hole when it comes to other Chinese dialects...

I doubt that the 48 Great Vows had all these inane Sinosphere pronunciation and dialect issues in mind...